Box-strap seal.



R. H. NORTON.

BOX STRAP SEAL.-

APPucATloN man sEPT.22. 1911.

1,260,016. Patented Mar. 19, 1918.

UNITED sTATEs PATENT oEEIoE.V

RALPH I-I. NORTON, OF CHICAGO, ILLINOIS, ASSIGNOR TO ACME STEEL GOODSCOMPANY, OE CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

` BOX-STRAP SEAL.

Specification of Letters Patent.

Patented Mar. 19, 1918.

I Application led September 22, 1917. Serial No. 192,644.

I citizen of the United States, residing at Chicago, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Box-Strap Seals, of which the following is aspecification.

The object of this invention is to further improve the holding qualitiesof a device of this class, and that object is attained by so treatingthe inclosing sleeve and inclosed overlapped strap ends that transverseedges of the parts may be caused to cross whereby separation of theparts will be resisted by direct edge to edge contact.

In the drawings which accompany and form part of this specificationFigure 1 represents the seal completed in top plan view; Fig. 2represents the same in side or edge view; Fig. 3 is a longitudinalsection on line 3-3 of Fig. l; Fig. 4 is a cross section on line 4--4 ofFig. 2; Fig. 5'is a broken perspective on an exaggerated scale; Fig. 6shows the sleeve of the seal in perspective.

Reference letters A and B designate the strap ends, respectively, and Cdesignates the metal sleeve which surrounds them. This sleeve is madewith centrally located extensions c at each end of the top. Theseconstitute ledges under which the strap ends may be slid which willmanifestly facilitate the insertion of the strap ends through thesleeve. The sleeve is essentially a flat tube of the general charactercommonly employed heretofore in these box strap seals. Instead ofresorting to such punching or crimping practices as heretofore pursuedin a variety of ways, I effect an interlocking of the sleeve and thestrap ends by shearing them to a limited extent at the side margins anddisplacing and delecting the metal of both sleeve and strap ends so asto bring about the crossing of the sheared edges. The longitudinalcentral portion or area of both sleeve and stra ends is left flat andcontinuous and this is true also as to the central transverse area ofthese parts. I practise the shearing at the outer boundaries of this`spondingly deflected edges of the strap ends Furthermore the strapsthemselves are intransverse central portion cutting down at the marginsthereof preferably at two places on both sides, as shown at d. .The saidcentral transverse portion thus becomes defined at the side edges byvertical incisions which go through the metal of the sleeve and alsothrough the inclosed metal of the two strap ends. The metalof the sleeveand the strap ends which confronts these incisions is compressed as tothe metal of the sleeve and bent so that edges of these parts aredefiected. The result is that thus deflected edges of the sleeve arecarried across edges of the'inclosed strap ends which have remained inthe normal plane (see Fig. 5) and correare carried across edges of thesleeve which have remained in the normal plane. Conseagy quently thereare sets or pairs of crossed edges whereby the sleeve resists anytendency of either strap end to pull out of the sleeve andcorrespondingly there are sets or pairs of crossed edges which resistany tendency of the sleeve to be pulled ,along either strap end by astrain-on the other strap endl.

terlocked so that each' resists pulling iaway of the other,-inasmuch asedges of one strap cross edges offthe other.

I claim: A I

1. A strap seal comprising overlapped strap ends and a sleeve 'embracinthem, marginal portions of sleeve and inclosed strap ends beingsimultaneously sheared through and adjacent metal of sleeve and strapincidentally deflected, and edges thereof crossed, a sheared sleeve-edgeand a sheared strap-edge interlocking edge to edge against relativelongitudinal movementof sleeve and strap.

2. A strap-seal comprising overlapped strap ends and a sleeve embracingthem,mar ginal portions of sleeve and inclosed strap ends being shearedthrough at a plurality of points and adjacent metal of sleeve andv strapincidentallydetlected and -.edges there- 95 interlocked against relativelongitudinal movement of sleeve and strap in both directions.

3. A strap-seal comprising overla ped 5 strap ends and a sleeveembracing t em marginal portions of sleeveand lnclose strap ends beingsimultaneously shearexi through at two points on each side and metal ofsleeve and strap acjaceni; the euts of each marginal pair oppositelydeeeted l0 whereby edges thereof are caused to cross edges ofintervening undeected metal.

RALPH H. NORTN.

